17-4 SS AR15 (PISTOL CALIBER) or AR10 (308) Carbine XP Spring

Pistol caliber carbines such as 9mm, .40 S&W, .45 ACP, and 10mm are a blast to shoot but can be tough on AR-15's internal components. Without a properly tuned blowback system, you run the risk of being overly destructive on internal lower parts. Running a blowback AR15 with a suppressor can further increase the risk for damage. In addition to a properly weighted buffer, the KVP Extra Power recoil spring is a must! The KVP XP 17-4 SS spring offers increase pre-load over standard springs. The additional preload helps increase the Blowback systems dwell time.

• • 17-4 Stainless Steel
  • Use in 9MM, 10MM, .40 S&W, or .45 ACP blowback AR systems.
  • Increases AR-15's dwell time in blowback setups
  • Increases Pre-load
  • Quiets action (better for suppression)
  • Reduces felt recoil
  • Designed only for Carbine Length Stock and pistol kits.